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Erschienen in:
2005 | OriginalPaper | Buchkapitel
A New Pre-processing Method for Multi-channel Echo Cancellation Based on Fuzzy Control
verfasst von : Xiaolu Li, Wang Jie, Shengli Xie
Erschienen in: Fuzzy Systems and Knowledge Discovery
Verlag: Springer Berlin Heidelberg
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The essential problem of multi-channel echo cancellation is caused by the strong correlation of two-channel input signals and the methods of pre-processing are always used to decorrelate it and the decorrelation degree depends on nonlinear coefficient
α
. But in most research,
α
is constant. In real application, the cross correlation is varying and
α
should be adjusted with correlation. But there is not precise mathematical formula between them. In this paper, the proposed method applies fuzzy logic to choose
α
so that the communication quality and convergence performance can be assured on the premise of small addition of computation. Simulations also show the effect of validity method.